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optical indictor | |||
optic indicator; optical indicator | |||
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optical indicator |
光 指示器 : 86 phrases in 10 subjects |
Agriculture | 1 |
Air defense | 3 |
Automobiles | 4 |
Aviation | 19 |
Electronics | 18 |
General | 2 |
Nuclear and fusion power | 1 |
Oil / petroleum | 2 |
Space | 11 |
Technology | 25 |